Investigations

Question 1

Determining the specific heat capacity of a material

Answer 1

1. Insulate the material and use a lid for liquids
2. Let the temperature rise as much as possible to reduce uncertainty
3. Use ammeter and voltmeter in circuit
4. Use P = IV
5. Power * time = power supplied
6. Rearrange E=mcΔθ for c

Question 2

Determine the Specific latent heat of fusion

Answer 2

1. VI = power of heater
2. After set time measure mass of both beakers water with electronic balance
3. Difference in masses is amount melted
4. Use E = mL

Question 3

Oscillating bung investigation

Answer 3

1. Mark desired distance on rope 0.3m
2. Add varying weight to other side of string
3. Measure period of 10 complete rotations with a stopwatch and divide by 10 for reliability
4. Find velocity with d/t
5. Plot F against v^2 draw line of best fit
6. Gradient = m/r to find m as r is distance on rope